Lock



Patented Feb. 11, 1930 PATENT OFFICE ALLEN T. LONG, F PETERSBURG, VIRGINIA LOCK Application filed September 15, 1928.

This invention relates to improvements in locks and more particularly to a modification of the lock plate illustrated in my co-pending application, Serial No. 306,114, filed on the 6 15th day of September, 1928, for Trunk locks.

In the application above identified, I have described a key plate and bolt construction admitting of the use of smooth-topped bolts and eliminating the use of guide pins and similar expedients which must be inserted in either the tumbler or plate in the course of construction thereof. This reduces, to a great extent, the cost of the lock, as compared with the ordinary construction, wherein the key plate is a composite structure built up of a number of sections which are secured together and usually has sockets for the reception of pins carried by the bolts or pins carried by the plate for engagement in sockets formed in the bolt. In either construction, the several sections of the plate from which the plate are formed must be secured together by rivets or the like, rendering the cost of construction excessive and the assembling operation difficult.

The present invention contemplates a modification of this structure, wherein the key plate is a composite plate as in prior constructions but the securing means of the plate sections and the operating pins for the bolts are one and the same, thus materially reducing the cost of construction and eliminating a number of operations.

A still further object of the invention is to provide in a construction of this character an arrangement such that said securing means may actually constitute a portion of one of the plates.

These and other objects I attain by the construction shown in the accompanying drawing, wherein for the purpose of illustration is shown a preferred embodiment of my invention and wherein Figure 1 is a front elevation of the lock;

5 ified form of key plate;

Figure 2 is a section on the line 2 2 of Fig- Serial No. 306,115.

Figure 5 is a plan view of the key plate of Figure 4:;

Figure 6 is a transverse Sectional view therethrough Figure 7 is an end elevation thereof.

Referring now inore particularly to the drawing, the numeral 10 generally designates a lock plate, 11 the lock cup and 12 the lock cap. Vithin the lock cup are arranged spring-pressed bolts 13 having angular shoulders 14 and having smooth upper faces. Upon the upper faces of these bolts is disposed a key plate 15 upon which is seated the lower end of a lock barrel 16, which eXtends outwardly through the lock plate 10 and has at its outer end a reduced extension engaged in an opening formed in the cap, as described in the prior application above identified.

In order to provide a means for retaining the lower end of the barrel against transverse displacement with relation to the key plate, provide a key stop and provide means for operating the bolts by engagement behind the shoulders 14 thereof as the key plate is rotated, I superimpose upon this key plate 15 7 an auxiliary plate 17 having its central portion bowed upwardly, as vindicated at 18, and provi ded with an opening of the same diameter as the key barrel at one side of which a cove 19 is provided, for the reception of the key and the side edges 20 of which form key stops or abutments.

Means are provided for securing the plates 15 and 17 together which means shall project below the key plate 17 a suflicient distance to provide operating pins for the bolts. In Figure 3, these are illustrated as rivets 21 eX- tending through the plates for securing the plates together which project below the key plate to provide bolt pins, while in Figure 4, the auxiliary plate 17 has at its ends lugs 22 which are bent downwardly over the sides of notches 23 formed in a key plate 26 and thus serving to both connect the plates and to constitute the operating pins for the bolts. 90 These lugs are formed with restricted necks which enter and fit in coves 24; formed at the bases of the notches. The plates 15 or 26 may be either completely circular, as illustrated in Figure 3, or partly circular as in Figure 5.

In the latter structure, the end edges of the plate will be provided with contact portions engaging the wall of the cup, so that the plate is guided and centered. In each construction, the plate will be provided with the usual opening for the reception of the key tip.

lVhile I have above described my invention as applied particularly to trunk locks, it will. of course, be obvious that the principle employed may be conveniently used in other types of locks having a similar construction and will materially reduce the cost of manufacture thereof and simplify the assembling operation.

It will also be obvious that. the construction hereinbefcre set forth is capable of a certain range of change and modification without materially departing from the spirit of the invention and I accordingly do not limit myself to such specific structure except as hereinafter claimed.

I claim 1. In a lock, a casing, a bolt within the casing and spring-pressed to project therefrom, a plate seated upon the bolt and rotatable within the casing, a key barrel seated at its inner end upon the plate at the axis thereof, a second plate seated upon the first named plate having an aperture receiving and fitting the lower end of the key barrel, said aperture being provided at one side with a cove, the side walls of which form key abutments, and means connecting said plates said means having engagement with the bolt and retracting the same as the plate is rotated.

2. In a lock, a casing, a bolt within the casing and spring-pressed to project therefrom, a plate seated upon the bolt and rotatable within the casing, a key barrel seated at its inner end upon the plate at the axis thereof, a second plate seated upon the first named plate having an aperture receiving and fitting the lower end of the key barrel, said aperture being provided at one side with a cove, the side walls of which form key abutments, and means integral with the last named plate having coaction with the first named plate, maintaining said plates in assembled relation and extending beyond the first named plate and having engagement with the bolt and retracting the same as the plate is rotated.

3. In a lock, a casing, a bolt within the casing and spring-pressed to project therefrom, a plate seated upon the bolt and rotatable within the casing, a key barrel seated upon the plate at the axis thereof, a second plate seated upon the first named plate having an aperture receiving and fitting the lower end of the key barrel, said aperture being provided at one side with a cove, the side walls of which form key abutments, and means connecting said plates having engagement with the bolt retracting the same as the plateus rotated, said second plate being ofiset at ts ends to thereby space the central portion thereof from the upper surface of the first named plate.

a. In a lock, a casing, a bolt within the casing and spring-pressed to project therefrom, a plate seated upon the bolt and rotatable within the casing, a key barrel seated upon the plate at the axis thereof, a second plate seated upon the first named plate having an aperture receiving and fitting the lower end of the key barrel, said aperture being provided at one side with a cove, the side walls of which form key abutments, and means integral with the last named plate having coaction with the first named plate maintaining said plates in assembled relation and having engagen'ent with the bolt retracting the same as the plate is rotated, said second plate being offset at its ends to thereby space the central portion thereof from the upper surface of the first named plate.

5. In a lock, a casing, a pair of opposed bolts within the casing and spring-pressed to project therefrom, said bolts each having an outwardly extending shoulder, a plate seated upon the bolt and rotatable within the casing, a key barrel seated upon the plate at the axis thereof, an auxiliary plate-having an opening to rotatably receive the key barrel provided with a cove the side walls of which form key abutments, and means engaging said plates to maintain the same in assembled relation extending below the first named plate to engage behind the shoulders of the bolts and withdraw the same as the plate is rotated.

6. A device as claimed in claim 5, wherein the means maintaining the plates in assembled relation comprises lugs formed upon said auxiliary plate having enlarged heads at their free ends, said lugs being pressed into coves formed in the first named plate. i

7. In a lock, a casing, a pair of opposed bolts within the casing and spring-pressed to project therefrom, said bolts each having an outwardly extending shoulder, a plate seated upon the bolt and rotatable within the casing, a key barrel seated upon the plate at the axis thereof, an auxiliary plate having an opening to rotatably receive the key barrel provided with a cove the side walls of which form key abutments, and means engaging said plates to maintain the same in assembled relation extending below the first named plate to engage behind the shoulders of the bolts and withdraw the same as the plate is rotated, the auxiliary plate being bowed upwardly at its center.

In testimony whereof I hereunto affix my signature.

ALLEN`v T. LONG. 

